Think about the things you had to look up on the internet just to figure out how to do your current job. Or maybe those things aren’t even on the internet—you learned from direct experience. You should write that stuff down, because when you connect your ideas into a written piece, you give voice and direction to something that otherwise just rattles around in the form of entrenched habits and beliefs—a resigned “that’s just the way we’ve always done it around here.”
Write to connect the dots, write to understand. You don’t have to publish your writing to everyone although that pressure helps keep you accountable; what’s more important is the act of writing itself. Are you writing (thinking) enough?